<ComplyLast> eprint.iacr.org/2021/631.pdf

<ComplyLast> Abstract:Decentralized token exchanges allow for se-cure trading of tokens without a trusted third party.However, decentralization is mostly achieved at the ex-pense of transaction privacy. For a fair exchange, trans-actions must remain private to hide the participantsand volumes while maintaining the possibility for non-interactive execution of trades. In this paper we presenta swap

confidential transaction system

(SwapCT) whichis related to ring confidential transactions (e.g. usedin Monero) but supports multiple token types to tradeamong and enables secure, partial transactions for non-interactive swaps. We prove that SwapCT is secure ina strict, formal model and present its efficient perfor-mance in a prototype implementation with logarithmicsignature sizes for large anonymity sets.

For our con-struction we design an aggregatable signature schemewhich might be of independent interest. Our SwapCTsystem thereby enables a secure and private exchangefor tokens without a trusted third party.

Interesting thanks for sharing :)